html,body {
    z-index: -1;
    margin: 0; 
    height: 100%; 
    overflow: hidden;
    color: #00ff00; 
    font-family: 'Courier New', Courier, monospace; 
    background-color: #000000; 
    background-image: radial-gradient(rgb(0, 150, 0), black 80%);
    text-shadow: 0 0 5px #66ff00;
  }
  
.crt::before {
    content: "";
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.25) 50%), linear-gradient(90deg, rgba(255, 0, 0, 0.06), rgba(0, 255, 0, 0.02), rgba(0, 0, 255, 0.06));
    z-index: 5;
    background-size: 100% 2px, 10px 100%;
    pointer-events: none;
  }

@keyframes textShadow {
    0% {
      text-shadow: 0.4389924193300864px 0 1px rgba(0,30,255,0.5), -0.4389924193300864px 0 1px rgba(255,0,80,0.3), 0 0 3px;
    }
    5% {
      text-shadow: 2.7928974010788217px 0 1px rgba(0,30,255,0.5), -2.7928974010788217px 0 1px rgba(255,0,80,0.3), 0 0 3px;
    }
    10% {
      text-shadow: 0.02956275843481219px 0 1px rgba(0,30,255,0.5), -0.02956275843481219px 0 1px rgba(255,0,80,0.3), 0 0 3px;
    }
    15% {
      text-shadow: 0.40218538552878136px 0 1px rgba(0,30,255,0.5), -0.40218538552878136px 0 1px rgba(255,0,80,0.3), 0 0 3px;
    }
    20% {
      text-shadow: 3.4794037899852017px 0 1px rgba(0,30,255,0.5), -3.4794037899852017px 0 1px rgba(255,0,80,0.3), 0 0 3px;
    }
    25% {
      text-shadow: 1.6125630401149584px 0 1px rgba(0,30,255,0.5), -1.6125630401149584px 0 1px rgba(255,0,80,0.3), 0 0 3px;
    }
    30% {
      text-shadow: 0.7015590085143956px 0 1px rgba(0,30,255,0.5), -0.7015590085143956px 0 1px rgba(255,0,80,0.3), 0 0 3px;
    }
    35% {
      text-shadow: 3.896914047650351px 0 1px rgba(0,30,255,0.5), -3.896914047650351px 0 1px rgba(255,0,80,0.3), 0 0 3px;
    }
    40% {
      text-shadow: 3.870905614848819px 0 1px rgba(0,30,255,0.5), -3.870905614848819px 0 1px rgba(255,0,80,0.3), 0 0 3px;
    }
    45% {
      text-shadow: 2.231056963361899px 0 1px rgba(0,30,255,0.5), -2.231056963361899px 0 1px rgba(255,0,80,0.3), 0 0 3px;
    }
    50% {
      text-shadow: 0.08084290417898504px 0 1px rgba(0,30,255,0.5), -0.08084290417898504px 0 1px rgba(255,0,80,0.3), 0 0 3px;
    }
    55% {
      text-shadow: 2.3758461067427543px 0 1px rgba(0,30,255,0.5), -2.3758461067427543px 0 1px rgba(255,0,80,0.3), 0 0 3px;
    }
    60% {
      text-shadow: 2.202193051050636px 0 1px rgba(0,30,255,0.5), -2.202193051050636px 0 1px rgba(255,0,80,0.3), 0 0 3px;
    }
    65% {
      text-shadow: 2.8638780614874975px 0 1px rgba(0,30,255,0.5), -2.8638780614874975px 0 1px rgba(255,0,80,0.3), 0 0 3px;
    }
    70% {
      text-shadow: 0.48874025155497314px 0 1px rgba(0,30,255,0.5), -0.48874025155497314px 0 1px rgba(255,0,80,0.3), 0 0 3px;
    }
    75% {
      text-shadow: 1.8948491305757957px 0 1px rgba(0,30,255,0.5), -1.8948491305757957px 0 1px rgba(255,0,80,0.3), 0 0 3px;
    }
    80% {
      text-shadow: 0.0833037308038857px 0 1px rgba(0,30,255,0.5), -0.0833037308038857px 0 1px rgba(255,0,80,0.3), 0 0 3px;
    }
    85% {
      text-shadow: 0.09769827255241735px 0 1px rgba(0,30,255,0.5), -0.09769827255241735px 0 1px rgba(255,0,80,0.3), 0 0 3px;
    }
    90% {
      text-shadow: 3.443339761481782px 0 1px rgba(0,30,255,0.5), -3.443339761481782px 0 1px rgba(255,0,80,0.3), 0 0 3px;
    }
    95% {
      text-shadow: 2.1841838852799786px 0 1px rgba(0,30,255,0.5), -2.1841838852799786px 0 1px rgba(255,0,80,0.3), 0 0 3px;
    }
    100% {
      text-shadow: 2.6208764473832513px 0 1px rgba(0,30,255,0.5), -2.6208764473832513px 0 1px rgba(255,0,80,0.3), 0 0 3px;
    }
  }

@keyframes flicker {
    0% {
    opacity: 0.27861;
    }
    5% {
    opacity: 0.34769;
    }
    10% {
    opacity: 0.23604;
    }
    15% {
    opacity: 0.90626;
    }
    20% {
    opacity: 0.18128;
    }
    25% {
    opacity: 0.83891;
    }
    30% {
    opacity: 0.65583;
    }
    35% {
    opacity: 0.67807;
    }
    40% {
    opacity: 0.26559;
    }
    45% {
    opacity: 0.84693;
    }
    50% {
    opacity: 0.96019;
    }
    55% {
    opacity: 0.08594;
    }
    60% {
    opacity: 0.20313;
    }
    65% {
    opacity: 0.71988;
    }
    70% {
    opacity: 0.53455;
    }
    75% {
    opacity: 0.37288;
    }
    80% {
    opacity: 0.71428;
    }
    85% {
    opacity: 0.70419;
    }
    90% {
    opacity: 0.7003;
    }
    95% {
    opacity: 0.36108;
    }
    100% {
    opacity: 0.24387;
    }
  }
  
.crt::after {
    content: " ";
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: rgba(18, 16, 16, 0.1);
    opacity: 0;
    z-index: 5;
    pointer-events: none;
    animation: flicker 1s infinite;
  }

header{
  width: 100%;
  height: 15%;
  display: flex;
  margin: 5% 0 2% auto;
}

header pre {
  width: 53%;
  margin: 0 auto;
  text-align: center;
  font-size: 1vw;
}

section{
  width: 100%;
  height: 100%;
  display: relative;
}

.areas{
  display: grid;
  grid-template-columns: 1fr 1fr;
  z-index: 1;
  grid-gap: 5px;
  height: 100px;
  width: 53.5%;
  margin: 0 auto 5% auto;

}

.terminal {
 
    width: 25vw; /* Largura */
    height: 25vh;
    font-family: 'Courier New', Courier, monospace; /* Fonte tipo da época */
    font-size: 1em;
    font-weight: bold;
    background-color: rgba(214, 3, 3, 0); /* Cor preta */
    color: #00ff00; /* Cor verde */
    border: solid 5px #00ff00; /* Borda verde */
    resize: none;
  }

  [placeholder]:empty::before {
    content: attr(placeholder);
    color:#00ff00;
  }

  [placeholder]:empty:focus::before {
    content: "";
}

.resposta {

  width: 25vw; /* Largura */
  height: 25vh;
  font-family: 'Courier New', Courier, monospace; 
  font-size: 1em;
  font-weight: bold;
  background-color: rgba(214, 3, 3, 0);
  color: #00ff00; 
  border: solid 5px #00ff00; 
  resize: none;
}

.terminal:focus, .resposta:focus {
      outline: none;
}

.aviso{
  width: 100%;
  margin: 0 auto;
}

.info{
  display: relative;
  width: 14%;
  height: 1%;
    font-size: 1em;
    margin: 10% auto 1%  auto;
}

.botoes{
  display: flex;
  z-index: 1;
  height: 2%;
  width: 40%;
  margin: 0 auto 5% auto;
}

.btn-encod, .btn-decod, .copiar{
    background: rgba(0, 255, 0, 0);
    border: 5px solid #00ff00;
    border-radius: 0px;
    margin: 0 1vw;
    color: #00ff00;
    font-family: 'Courier New', Courier, monospace;
    font-size: 1vw;
    font-weight: bold;
    cursor: pointer;
    height: 50px;
    width: 250px;
    transition: 500ms all;
    
}

button:hover{
border: 10px solid #00ff00;
transform: scale(0.9);
transition: 500ms border;
transition: 1000ms transform;
transition: 100ms background-color;
}

button:active{
  background-color: #00ff00;
  border: 0px solid #00ff00;
}

.ascii-vazia{
  width: 100%;
  float: top;
  margin: 10% 10% 10% 3%;
  z-index: 1;
  position: relative;
  display: block;
  font-size: 0.5vw;
  }